Looking for something to power my jato/pede Novak 5.5/6.5 or 5800?

[R00ST]

I just got back from my trip to florida with the e-revo (8xl/9920/14 ib3800 cells) and it was a blast until the second to last day and it finally ate the revo diffs :( I will have pics/vids up soon though :)

I have run the novak 5800 system in my rustler/stampede for a long time now (shortly after they came out with the system). I have been pretty satisfied with it, but I am now looking into putting the jato suspension on my pede and getting a new system. Smooth drivability is pretty important for this truck, which is why im thinking I should stick with the sensored novak (that and the price).
I currently have a new in box ss5800 in my basement that I was contemplating putting in the pede or selling. Now that the new gtb 5.5/6.5 is out, can anyone compare it to the 5800? Sadly 5800 systems are not selling for much, so it looks like it would be about a 100 dollar upgrade to get a new 5.5/6.5 system. I would be running 90% on ib3800 7 cells and gp3300 7 cells (possibly some 6 cell packs on occasion). I was thinking I would go with the 5.5 for the most power, but I do enjoy longer run times. I have heard a lot of people generalizing the 6.5 for racing and 5.5 for bashing, but am wondering how big of a difference in run time they would have weighted against the power gain.

Any help is greatly appreciated!